fix sbt issue on alpine.

Containerfile

@@ -1,9 +1,15 @@
 FROM alpine:3.16
-RUN apk add bash git clang binutils-gold cmake make libgcc musl-dev gcc g++ libc6-compat libtool automake autoconf
-RUN apk add sbt --repository=http://dl-cdn.alpinelinux.org/alpine/edge/testing
+RUN apk add bash git clang binutils-gold cmake make libgcc musl-dev gcc g++ libc6-compat libtool automake autoconf openjdk11
 RUN git clone https://github.com/libuv/libuv && cd libuv && ./autogen.sh && ./configure && make && make install
 RUN git clone https://github.com/bitcoin-core/secp256k1 && cd secp256k1 && ./autogen.sh && ./configure --enable-module-schnorrsig --enable-module-recovery && make && make install
 COPY . /poncho
-RUN cd /poncho && sbt clean compile
+
+# sbt
+RUN mkdir /sbt
+RUN cd /sbt && wget https://github.com/sbt/sbt/releases/download/v1.8.2/sbt-1.8.2.zip
+RUN cd /sbt && unzip sbt-1.8.2.zip
+
+# build binary native static
+RUN cd /poncho && /sbt/sbt/bin/sbt clean compile
 ENV SN_LINK=static
-CMD cd /poncho && sbt clean nativeLink
+CMD cd /poncho && /sbt/sbt/bin/sbt clean nativeLink

src/main/scala/Database.scala

@@ -129,9 +129,9 @@ class Database(val path: Path = Paths.get("poncho").toAbsolutePath()) {
     val newData = change(data)
 
     newData.channels
-      .filter((key, chandata) =>
+      .filter { (key, chandata) =>
         !data.channels.contains(key) || data.channels(key) != chandata
-      )
+      }
       .foreach { (key, chandata) =>
         val data = newData.channels(key)
         val file = channelsDir.resolve(key.toHex ++ ".json")